OpenGL 4.x

Conventions

To find the name of an OCaml function corresponding to a C
function name, map the gl prefix to the module name
Tgl4.Gl,
add an underscore between each minuscule and majuscule and lower
case the result. For example glGetError maps to
Tgl4.Gl.get_error

To find the name of an OCaml value corresponding to a C enumerant name,
map the GL_ prefix to the module name Tgl4.Gl
and lower case the rest. For example GL_COLOR_BUFFER_BIT maps to
Tgl4.Gl.color_buffer_bit.